Mock-up image in Photoshop

I am looking for someone to create me an image for an upcoming press release (this week if possible, ASAP).

We run a Christmas tree delivery service and what I need is a high res image of a small car (Fait 500, old skool mini) wrapped with our logo, with a Christmas tree strapped to the top.

* The tree should be a bit too big for the car but not unbelievable.
* The car wrap should use both our Green and accent Pink (see www.goodelf.co.uk)
* I would like a version with no background and one with a London St scene of your choice.
* You must have the rights to use and alter any images used in the creation of the image
* Full copyrights to the finished image will be passed to the Good Elf Limited
* You can add an Elf if you really, really want to ;)